Complex Numbers Calculator

Georg Kiefer · an.CompX

Not rated yet 100K+ downloads v26.9.2 968.8 KB Android 5.0+ PEGI 3 · Everyone

Download APK 968.8 KB All versions

Same certificate as v23.8, which matches Google Play Details

At a glance

Latest version: v26.9.2 (102)
Updated: Sep 17, 2026 (21 days ago)
APK size: 968.8 KB
Requires: Android 5.0+ (API 21)
CPU support: Any (no native code)
Category: Education (app)
Listed since: Mar 24, 2020 (at least)
Permissions: 4
Website: bit.ly/gk-apps
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

Complex Numbers Calculator is an app by Georg Kiefer in the Education category, listed since at least March 2020. It has no native code, so it runs on any Android processor.

Since version 23.8, the APK grew from 620.1 KB to 968.8 KB and the minimum Android version rose from 4.1 to 5.0. It asks for 4 permissions, none of them sensitive. It asks for the same permissions as version 23.8. The app can read the advertising ID that ad and analytics services use.

What's new in v26.9.2

Modern design, improved calculations, interactive complex plane, detailed help and a new launcher icon.

Description

From the listing uploaded by “catappult”.

This is a free mathematical calculator for complex numbers, which is able to to add, subtract, multiply and divide complex numbers. The best math tool for school and college! If you are a student, it will helps you to learn complex number arithmetics.

Version history

2 versions are listed, going back to v23.8. Since v26.9.2 it requires Android 5.0+.

v26.9.2 LATEST Sep 17, 2026 968.8 KB TRUSTED v23.8 Oct 30, 2024 620.1 KB TRUSTED

All 2 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Certificate issued to “Georg Kiefer” This is the certificate of the Google Play version.
Same certificate as v23.8, which matches Google Play v23.8

Store checks and file details

Developer signature verified Sep 17, 2026
Signed byCN=Georg Kiefer, L=Koblenz, ST=Germany, C=DE
Signing certificate (SHA-1)75:C9:81:67:02:93:40:62:AE:2C:C2:9B:5F:B5:47:43:3B:A7:F0:52
File MD522a88d82b7e3f6566405919a1f1833a2
Uploaded by “catappult” Platinum tier · 1,377 followers · uploading since 2018

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (1 other version compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (4)

Complex Numbers Calculator requests 4 permissions, none of them sensitive.

Advertising ID com.google.android.gms.permission.AD_ID
Full network access android.permission.INTERNET
Google Play install referrer com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

Basic touch input android.hardware.faketouch
Portrait screen android.hardware.screen.portrait

Complex Numbers Calculator APK: questions and answers

Is there a version of Complex Numbers Calculator for older Android phones?

The current version needs Android 5.0 or later. Version 23.8 is the newest listed build that installs on Android 4.1 and later. It is an old build: apps that rely on online services may no longer connect when they are this old. Get version 23.8 · All versions

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is the Complex Numbers Calculator APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. It is signed with the same certificate as version 23.8, whose signature matches the Google Play version. After downloading, check that the file's MD5 is 22a88d82b7e3f6566405919a1f1833a2.